Pros & Cons:

Supports visual organizing and re-ordering PDF pages in addition to the direct page number input.

Visual document composer occasionally encountered some errors.

Our Review:

PDFsam (PDF Split and Merge) is well worth trying if you need to visually re-order or recompose multiple pages of PDF files.

You can mix, merge or extract, split and rotate pages by specifying the page numbers. However, PDFsam also lets you re-organize PDF pages in a thumbnail view. In this mode, you can easily work with thumbnails to merge, delete, rotate or re-order PDF pages and save the results as another PDF file.

Since PDFsam is a Java application, it will run on any operating system that supports Java. The basic version of PDFsam is free for use. The installer is bundled with an advertising program OpenCandy but you can get from here a standalone zip file with no such bundle.

Comments

Very good program, but be sure to download from Sourceforge (msi).
Latest installer (exe) from PDFsam's site does not ask but installs Java 8 update 60 (very old) even if you already have a newer Java. For some reason, update 60 is quite difficult to uninstall by usual methods - it's necessary to download and install a newer Java, so that it removes 60.
The version from Sourceforge is not plagued with the nuisance.